Ice Forces Due to Impact Loading on a Sloping Structure

by R. J. Evans, Coon & Associates Inc, Seattle, WA, USA,
R. R. Parmerter, Coon & Associates Inc, Seattle, WA, USA,

Document Type: Proceeding Paper

Part of: Civil Engineering in the Arctic Offshore


Two approximate methods are presented for determining Dynamic Magnification Factors due to floe impact on sloping structures. Some of the physical processes involved are treated simplistically, particularly crushing of the ice at contact. Nevertheless, the analysis does indicate that impact loading DMFs should be considered in ice wall design. Frequencies calculated by the Rayleigh-Ritz procedure appear to be small compared to structural frequencies which the impact might excite and to justify the assumption that the structure is rigid. For practical purposes, the analysis should be extended to include the effect of structure diameter, and the Rayleigh-Ritz method will be convenient for this purpose.

Subject Headings: Ice loads | Slopes | Impact loads | Dynamic loads | Ice dynamics | Ice | Structural analysis | Offshore structures

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